Encyclopedia
Worship
Liturgy is performed through the combination of prayers, hymns, readings, and sacramental actions carried out by the clergy according to the established church rite. It serves as a means for Christians to express their religious faith and mystical communion with God
Source: "SP 31-103-99. Buildings, Structures, and Complexes of Orthodox Churches"
(adopted by the Decree of the Russian Federal Service for Supervision in Construction dated December 27, 1999 No. 92)